{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["members", "title of person", "city of headquarters", "countries of residence"], "input": "Miller returned to  London  's Covent Garden in April 1981 to fulfil one half of a Royal Ballet production portraying the legendary artistic dancer Isadora Duncan in  Kenneth MacMillan  's ballet Isadora ."}
{"members": [], "title of person": [], "city of headquarters": [], "countries of residence": []}